Three point knob



FIG. 1 is a perspective view of a three point knob, showing a top side my new design;

FIG. 2 is a perspective view thereof, showing a bottom side my new design;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines showing a threaded shaft in the figures are included for the purpose of illustrating the invention in use, and form no part of the claimed design. The broken lines in FIGS. 2 and 7 form no part of the claimed design. 

We claim the ornamental design for a three point knob, as shown and described. 